US3928679A - Method and apparatus for coating a multiple number of layers onto a substrate - Google Patents

Method and apparatus for coating a multiple number of layers onto a substrate Download PDF

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Publication number
US3928679A
US3928679A US327048A US32704873A US3928679A US 3928679 A US3928679 A US 3928679A US 327048 A US327048 A US 327048A US 32704873 A US32704873 A US 32704873A US 3928679 A US3928679 A US 3928679A
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United States
Prior art keywords
substrate
coating
liquid
layers
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US327048A
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English (en)
Inventor
Brian W Jackson
Dean E Winkler
Charles B Woodworth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US327048A priority Critical patent/US3928679A/en
Priority to IT19590/74A priority patent/IT1007578B/it
Priority to FR7402172A priority patent/FR2215270B1/fr
Priority to AR252031A priority patent/AR223295A1/es
Priority to GB333774A priority patent/GB1458853A/en
Priority to DE19747402360U priority patent/DE7402360U/de
Priority to DE2403313A priority patent/DE2403313C3/de
Priority to CH107874A priority patent/CH591903A5/xx
Priority to JP49010887A priority patent/JPS5139981B2/ja
Priority to BE140210A priority patent/BE810194A/fr
Priority to US05/588,261 priority patent/US3996885A/en
Application granted granted Critical
Publication of US3928679A publication Critical patent/US3928679A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G03C2001/7411—Beads or bead coating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G03C2001/7466—Geometry and shape of application devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G03C2001/7477—Lip detail or shape in hopper or extrusion head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/136—Coating process making radiation sensitive element

Definitions

  • This invention relates to improvements in coating methods and apparatus wherein two or more coating compositions are simultaneously applied to a substrate, such as, say, a web.
  • the slide portion of the hopper may include one or more separate exit slots, whereby respective liquid coating compositions may be metered from individual supplies and distributed uniformly across respective inclined slide surfaces.
  • Each of the respective compositions flows by gravity as a layer down its respective inclined surface, whereby the layer becomes smooth and of uniform thickness.
  • the slide surfaces are arranged so that the layers flow on top of one another. At the end of the lowermost slide surface, i.e., the one adjacent to the extrusion outlet(s), the one or more layers flow on top of a bridge of liquid that is established by liquid coating composition from the extruder portion of the hopper.
  • the bridge of liquid coating composition from the extruder portion spans the generally horizontal gap between an outlet edge of the extruder portion of the coating hopper and the generally upwardly moving substrate.
  • the layer(s) of coating composition from the slide surface(s) thus flow over the bridge, and the substrate, as it is advanced into contact with the bridge, simultaneously picks up all the coating compositions from the extruder and the slide surface(s) and these compositions deposit on the substrate as a composite coating of substantially distinct superimposed layers.
  • a furtherproblem with the use of the coating hopper described in the afore-mentioned Russell patents is that particles in the liquid coating composition may adhere to the hopper at the lip edge thereof and cause undesirable streaks to be formed in the coating.
  • An apparatus and method which reduces or minimizes the deleterious effects of such particles on coatings represents a significant contribution to the state of the art.
  • a multiple-layer coating hopper is provided with an extrusion outlet through which one or more layers of liquid coating composition(s) are extruded directly into a bridge of coating composition(s), which bridge spans a generally horizontal gap between the hopper and an upwardly moving substrate to be coated.
  • the hopper is further provided with a downwardly inclined slide surface upon which one or more layers of liquid coating composition(s) are made to flow so the layers become smooth and of uniform thickness.
  • a lip is provided which extends toward the substrate at an obtuse angle relative to the slide surface and the layer(s) of coating composition(s) may flow upon this lip before being fed into the bridge of coating composition(s).
  • FIG. 1 is a side view, partly in section, showing a coating apparatus including a multiple-layer extrusionslide hopper as known in the prior art;
  • FIG. 2 is a close-up side view of an improved coating apparatus made in accordance with thcinvention, the portion of the hopper closest to the web being shown greatly magnified relative to the coating roller and the remainder of the hopper.
  • a substrate such as web W
  • the web may be paper, metal, or plastic film
  • the hopper is shown as being adapted to coat two layers simultaneously.
  • metering pumps P and P are coupled to respective sources of fluid coating compositions and feed the compositions 16,23 at desired rates into respective cavities 11,19 formed in the interior of hopper 10.
  • the compositions 16,23 are each then forced to flow as a ribbon through narrow discharge slots 14,21 respectively, each of which slots at one end extend into the interior of the hopper to a respective cavity and at the other end terminates in an exit 15,22 respectively.
  • the discharge slots 14,21 are each defined by a pair of opposed closely-spaced parallel planar surfaces 14,14"; 21,2l" respectively.
  • the substrate W is supported on the roller 13 proximate to exit 22 so that an extruded bridge of the coating composition 23 may be formed, which bridge spans the space between the exit 22 and the surface of the substrate W to be coated.
  • the exit of discharge slot 14 is located adjacent to and above a downwardly inclined planar slide surface 12.
  • the coating composition 16 is adapted to flow upon the planar slide surface 12 so as to become smooth and of uniform thickness.
  • the lower transverse edge of slide 12 is located proximate to the exit 22 of slot 21 and it may be noted that slide surface 12 is inclined at an acute angle relative to discharge slot 21. As the layer of coating composition 16 leaves the lower edge of slide 12, it flows into the bridge and both coating compositions 16,23 are picked up by the generally upwardly moving substrate W as it is rapidly advanced past the bridge.
  • the coating compositions 16,23 deposit onto a surface of the substrate W as a composite coating of substantially distinct superimposed layers.
  • a web or substrate is generally upwardly moving at a point where at such point its vertical component of velocity is greater in magnitude than its horizontal component of velocity.
  • suction or a vacuum may be employed on the trailing surface of the bridge to establish a pressure differential between the exposed surfaces of the bridge.
  • the suction may be provided by a chamber 25 that is coupled to a vacuum pump P", 28, to exhaust air from the chamber 25.
  • FIG. 2 a portion of an improved extrusion-slide hopper made in accordance with the present invention is shown.
  • the suction chamber has been deleted from the apparatus shown in FIG. 2, but such pressure differential establishing means is advantageous when used in conjunction with the apparatus of the invention.
  • the hopper shown in FIG. 2 is similar in most respects to that shown in FIG. I, but differs in that it includes a rigid upturned lip 31 which extends at an obtuse angle from the lower end of the slide surface 32 toward the surface of a generally upwardly moving substrate W, e.g., the web, being coated.
  • the lip 31 is preferably generally planar and of the same transverse width as the planar slide 32 and terminates in a transverse edge 34, defined by the planar land of the lip 31 and side face 39 of the extruder outlet 41.
  • the lip 31 may be formed on the apparatus of the prior art by machining, and in forming the lip it is preferred to round, as shown in FIG. 2, the obtuse angle 38 formed between the lip surface 31 and the slide surface 32.
  • Extrusion outlet 41 is spaced generally horizontally from the coating roller 33 a distance slightly greater than the thickness of the web W, to be coated so as to establish in operation of the hopper an extruded bridge of liquid coating composition 43, which bridge spans the gap between the hopper and the surface of the web W.
  • the gap between outlet 41 and the sur face of the web being coated is between about 0.005 (0.13 mm) inches to about 0.03 (0.76 mm) inches.
  • the liquid coating composition 36 after being forced from cavity 46 and through narrow metering slot 47, flows downwardly upon the slide surface 32, then along the generally horizontally directed rigid lip 31 and into the bridge of coating compositions.
  • the slide surface 32 is inclined relative to the horizontal at a desired angle that is preferably greater than ten degrees and less than 45, depending upon the properties of the liquid composition being coated. As the lip 31 is oflesser inclination to the horizontal than that of the slide surface 32, the layer of coating composition 36 flows over the lip with reduced speed, but increased thickness (depth).
  • the increased thickness of the layer on the upturned lip 31 is advanta geous in that the effects of any particles that happen to lodge at edge 34 may be minimized by a dilution of such effects by the thicker layers on the upturned lip, Le, a particle of a certain size that is lodged on the edge 34 will tend to create a greater disturbance in a thin (shallow) liquid, as opposed to a thicker (deep) liquid, as the liquid is flowed past the particle.
  • the lip 31 is directed in a generally horizontal direction, and is preferably horizontal, although it may be inclined relative to the horizontal in the direction of liquid flow within the preferred range ofi 5.
  • the length of the lip 31 in the direction of liquid flow is advantageously in the range of about 0.025 to 0.080 inches (0.06 cm to 0.21 cm), and is preferably about 0.040 inches (0.10 cm).
  • Such dimensions are advantageous in the coating of photographic compositions wherein coatings might vary between a dry thickness of 0.0001 to 0.001 inches and protective layers separating such coatings might be as thin as l micron.
  • the point of application of the liquid bridge to the web, W be within a preferred acute angular range of application points, and such preferred range is from about a point on the web that is located at about 40 below the horizontal radius of the coating roller 33 vertically to about 30 above said horizontal radius.
  • the generally horizontal gap is advantageous in that it allows gravity to act on the suspending bridge of coating liquids and facilitates the formation of the bridge.
  • one factor which may contribute to the inability of the bridge of liquid coating compositions at times to withstand higher pres sure differentials is that the bridge must, in addition to the pressure differential across it, support itself against the force of the downwardly rushing liquid layer(s) which is continuously feeding into the bridge.
  • two superimposed layers may" be simultaneously coated using in one instance a coating hop perembodying the invention, such as that shown in FIG. 2.
  • the lower layer of liquid coating com position mayhave a viscosity of 350 centipoise and a wet laydown of 0.68 pounds per hundred square feet.
  • the upper layer of liquid coating composition may have a viscosity of 350 centipoise and a wet laydown of 2.8 pounds per hundred square feet. Suction may be maintained across the bridge during coating with a gap between the extrusion outlet and the web of about 0.0l inches. It was found that in coating at high speeds, striations in certain coatings due to instability of the bridge, and which striations are present with the use of similar coating apparatus of the prior art are absent in such coatings when using the apparatus and method of the invention.
  • the invention may also be embodied in extrusion slide hoppers other than that specifically described herein.
  • the extrusion portion of the hopper may be comprised of more than one extruder outlet, such as shown in FIG. 3 of the afore-mentioned U.S. Pat. No. 2,761,417.
  • the hopper may be comprised of more than one slide surface arranged one above the other so that each of two or more layers may be fed along its respective slide surface before it flows in superimposed fashion with the other layers along the lowermost slide surface and the upturned lip.
  • An example of such a hopper, which may be modified in accordance with the present invention, is shown in FIG. 4 of the U.S. Pat. No. 2,761,417.
  • the method and apparatus of this invention can be utilized to coat materials or mixtures of materials which can be put in liquid form and coated, for example, in the form of a solution, dispersion, or a suspension.
  • the coating composition preferably comprises an organic solvent coating composition, but other liquid vehicles of either inorganic, such as aqueous, nature, can also be utilized and are fully within the contemplation of this invention.
  • the respective layers can be formed of the same or different liquid coating compositions, and these coating compositions can be either miscible or immiscible with one another. High viscosity polymeric layers may be advantageously coated with the method and apparatus of the invention using aqueous or organic vehicles.
  • the method and apparatus of this invention find application in many other areas of the coating art, where one or more coated layers in which one or more separate layers of different compositions are desired to impart particular properties to a product.
  • the method and apparatus of the invention are particularly useful in multiple-layer coating, where it is desired that the upper layer have a relatively high coverage (pounds per square foot) relative to the lower layer.
  • the invention provides an improved apparatus and method which may be used to coat a web at increased speeds. It will be further appreciated that such apparatus embodying the invention claimed herein may be made relatively inexpensively by modifying coating hoppers of the prior art.
  • a method of simultaneously coating a plurality of distinct superposed layersof liquid coating compositions onto a substrate from an extrusion-slide coating hopper having both an extruder slot and a downwardly inclined slide surface which method comprises the steps of:
  • both coating compositions are comprised of organic solvents.
  • a method of simultaneously coating a plurality of distinct superposed layers of liquid coating compositions onto a web substrate from an extrusion-slide coating hopper having both an extruder slot and a downwardly inclined slide surface which method comprises the steps of:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US327048A 1973-01-26 1973-01-26 Method and apparatus for coating a multiple number of layers onto a substrate Expired - Lifetime US3928679A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US327048A US3928679A (en) 1973-01-26 1973-01-26 Method and apparatus for coating a multiple number of layers onto a substrate
IT19590/74A IT1007578B (it) 1973-01-26 1974-01-18 Apparecchio e metodo per rivesti menti
AR252031A AR223295A1 (es) 1973-01-26 1974-01-23 Aparato para aplicar como recubrimiento dos o mas composiciones liquidas de recubrimiento sobre una superficie de un substrato
FR7402172A FR2215270B1 (fr) 1973-01-26 1974-01-23
DE19747402360U DE7402360U (de) 1973-01-26 1974-01-24 Vorrichtung zum gleichzeitigen auftragen mindestens zweier schichten fluessiger beschichtungsmaterialien auf eine oberflaeche eines guts, insbesondere eines bandes
DE2403313A DE2403313C3 (de) 1973-01-26 1974-01-24 Vorrichtung zum gleichzeitigen Auftragen mindestens zweier Schichten flüssiger Beschichtungsmaterialien auf eine Oberfläche eines Guts, insbesondere eines Bandes
GB333774A GB1458853A (en) 1973-01-26 1974-01-24 Coating apparatus and method
CH107874A CH591903A5 (fr) 1973-01-26 1974-01-25
JP49010887A JPS5139981B2 (fr) 1973-01-26 1974-01-25
BE140210A BE810194A (fr) 1973-01-26 1974-01-25 Tremie pour deposer simultanement plusieurs couches fluides surun support
US05/588,261 US3996885A (en) 1973-01-26 1975-06-19 Apparatus for coating a multiple number of layers onto a substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US327048A US3928679A (en) 1973-01-26 1973-01-26 Method and apparatus for coating a multiple number of layers onto a substrate

Related Child Applications (1)

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US05/588,261 Division US3996885A (en) 1973-01-26 1975-06-19 Apparatus for coating a multiple number of layers onto a substrate

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US3928679A true US3928679A (en) 1975-12-23

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US327048A Expired - Lifetime US3928679A (en) 1973-01-26 1973-01-26 Method and apparatus for coating a multiple number of layers onto a substrate

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US (1) US3928679A (fr)
JP (1) JPS5139981B2 (fr)
AR (1) AR223295A1 (fr)
BE (1) BE810194A (fr)
CH (1) CH591903A5 (fr)
DE (2) DE7402360U (fr)
FR (1) FR2215270B1 (fr)
GB (1) GB1458853A (fr)
IT (1) IT1007578B (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113903A (en) * 1977-05-27 1978-09-12 Polaroid Corporation Method of multilayer coating
US4143190A (en) * 1977-01-27 1979-03-06 Polaroid Corporation Method and apparatus for coating webs
US4154879A (en) * 1977-01-27 1979-05-15 Polaroid Corporation Method and apparatus for coating webs with a plurality of liquid layers
US4299188A (en) * 1978-12-25 1981-11-10 Fuji Photo Film Co., Ltd. Coating apparatus
US4445458A (en) * 1982-07-21 1984-05-01 E. I. Du Pont De Nemours And Company Beveled edge metered bead extrusion coating apparatus
US4863765A (en) * 1988-02-23 1989-09-05 Fuji Photo Film Co., Ltd. Method of multi-layer coating
US5310637A (en) * 1992-04-14 1994-05-10 Eastman Kodak Company Minimization of ripple by controlling gelatin concentration
US5332440A (en) * 1992-01-21 1994-07-26 E. I. Du Pont De Nemours And Company Coating lip geometry for slide bead coating
US5439708A (en) * 1991-06-03 1995-08-08 Fuji Photo Film Co., Ltd. Slide hopper-type method for coating moving web having reduced streaking
US5516545A (en) * 1991-03-26 1996-05-14 Sandock; Leonard R. Coating processes and apparatus
US5538754A (en) * 1991-03-26 1996-07-23 Shipley Company Inc. Process for applying fluid on discrete substrates
US5698033A (en) * 1994-06-09 1997-12-16 Basf Magnetics Gmbh Apparatus for the production of a magnetic recording medium
US5728430A (en) * 1995-06-07 1998-03-17 Avery Dennison Corporation Method for multilayer coating using pressure gradient regulation
US5962075A (en) * 1995-06-07 1999-10-05 Avery Dennison Method of multilayer die coating using viscosity adjustment techniques
US20030124254A1 (en) * 2001-12-27 2003-07-03 Rexam Image Products, Inc. Wet on wet process for producing films
US6824828B2 (en) 1995-06-07 2004-11-30 Avery Dennison Corporation Method for forming multilayer release liners

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001024A (en) * 1976-03-22 1977-01-04 Eastman Kodak Company Method of multi-layer coating
US5380365A (en) * 1992-01-21 1995-01-10 E. I. Du Pont De Nemours And Company Lip surface geometry for slide bead coating

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413143A (en) * 1963-12-10 1968-11-26 Ilford Ltd High speed coating apparatus
US3526528A (en) * 1965-10-28 1970-09-01 Fuji Photo Film Co Ltd Multiple doctor coating process and apparatus
US3531314A (en) * 1968-05-13 1970-09-29 Eastman Kodak Co Treatment of polymer surfaces for coating with photographic layers
US3607345A (en) * 1958-04-26 1971-09-21 Eastman Kodak Co Process for coating photographic emulsion layers
US3627564A (en) * 1970-07-16 1971-12-14 Eastman Kodak Co Method for coating a continuous web
US3640752A (en) * 1966-05-02 1972-02-08 Fuji Photo Film Co Ltd Coating method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3607345A (en) * 1958-04-26 1971-09-21 Eastman Kodak Co Process for coating photographic emulsion layers
US3413143A (en) * 1963-12-10 1968-11-26 Ilford Ltd High speed coating apparatus
US3526528A (en) * 1965-10-28 1970-09-01 Fuji Photo Film Co Ltd Multiple doctor coating process and apparatus
US3640752A (en) * 1966-05-02 1972-02-08 Fuji Photo Film Co Ltd Coating method
US3531314A (en) * 1968-05-13 1970-09-29 Eastman Kodak Co Treatment of polymer surfaces for coating with photographic layers
US3627564A (en) * 1970-07-16 1971-12-14 Eastman Kodak Co Method for coating a continuous web

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143190A (en) * 1977-01-27 1979-03-06 Polaroid Corporation Method and apparatus for coating webs
US4154879A (en) * 1977-01-27 1979-05-15 Polaroid Corporation Method and apparatus for coating webs with a plurality of liquid layers
US4113903A (en) * 1977-05-27 1978-09-12 Polaroid Corporation Method of multilayer coating
US4299188A (en) * 1978-12-25 1981-11-10 Fuji Photo Film Co., Ltd. Coating apparatus
US4445458A (en) * 1982-07-21 1984-05-01 E. I. Du Pont De Nemours And Company Beveled edge metered bead extrusion coating apparatus
US4863765A (en) * 1988-02-23 1989-09-05 Fuji Photo Film Co., Ltd. Method of multi-layer coating
US5538754A (en) * 1991-03-26 1996-07-23 Shipley Company Inc. Process for applying fluid on discrete substrates
US5516545A (en) * 1991-03-26 1996-05-14 Sandock; Leonard R. Coating processes and apparatus
US5439708A (en) * 1991-06-03 1995-08-08 Fuji Photo Film Co., Ltd. Slide hopper-type method for coating moving web having reduced streaking
US5332440A (en) * 1992-01-21 1994-07-26 E. I. Du Pont De Nemours And Company Coating lip geometry for slide bead coating
US5310637A (en) * 1992-04-14 1994-05-10 Eastman Kodak Company Minimization of ripple by controlling gelatin concentration
US5698033A (en) * 1994-06-09 1997-12-16 Basf Magnetics Gmbh Apparatus for the production of a magnetic recording medium
US5728430A (en) * 1995-06-07 1998-03-17 Avery Dennison Corporation Method for multilayer coating using pressure gradient regulation
US5962075A (en) * 1995-06-07 1999-10-05 Avery Dennison Method of multilayer die coating using viscosity adjustment techniques
US6824828B2 (en) 1995-06-07 2004-11-30 Avery Dennison Corporation Method for forming multilayer release liners
US20050074549A1 (en) * 1995-06-07 2005-04-07 Avery Dennison Corporation Method for forming multilayer release liners and liners formed thereby
US20050100677A1 (en) * 1995-06-07 2005-05-12 Avery Dennison Corporation Method for forming multilayer release liners and liners formed thereby
US20030124254A1 (en) * 2001-12-27 2003-07-03 Rexam Image Products, Inc. Wet on wet process for producing films
US6824818B2 (en) 2001-12-27 2004-11-30 Soliant Llc Wet on wet process for producing films

Also Published As

Publication number Publication date
DE7402360U (de) 1977-12-29
GB1458853A (en) 1976-12-15
DE2403313C3 (de) 1982-02-25
FR2215270A1 (fr) 1974-08-23
DE2403313A1 (de) 1974-08-08
CH591903A5 (fr) 1977-10-14
BE810194A (fr) 1974-07-25
JPS5139981B2 (fr) 1976-10-30
IT1007578B (it) 1976-10-30
DE2403313B2 (de) 1976-02-26
JPS49107041A (fr) 1974-10-11
FR2215270B1 (fr) 1977-06-10
AR223295A1 (es) 1981-08-14

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